#include <stdio.h>
#include <stdlib.h>

#define ZERO 0
#define PI 3.14
enum { MALE, FEMALE, SECRET };
int main(int argc, char *argv[]) {
  3.14;
  1000;
  printf("zero = %d\n", ZERO);
  double radius = 2.3;
  double area = PI * radius * radius;
  printf("%lf\n", area);
  const int num = 10;
  printf("%d\n", MALE);
  printf("%d\n", FEMALE);
  printf("%d\n", SECRET);
  return EXIT_SUCCESS;
}
